I've been vaping since 2013. Don't plan to stop.
What has changed? Early on in my journey, the only people vaping tended to be comfortable with new technology. You'd have to be, to try this hair brained idea.
With that, pretty much everyone experimented, and innovated. The early ECF threads document some of the first trials of adding Apple Cider vinegar and other acids to eliquid to balance PH (salts) the first people to mod flash lights. The first squonkers.
Now days. Everyone vapes. Most don't experiment, at all.
The innovation is gone...